code: def templateTestColoringNegativeConnections(
      self, filename, solver_type=solve_type.FAST
  ):
      result_testing = False
  
      # If phases crosses each other because of random part of the network then we should try again.
      for attempt in range(0, 3, 1):
          graph = read_graph(filename)
          syncgcolor_network = syncgcolor(graph.data, 0, -1)
  
          analyser = syncgcolor_network.process(solution=solver_type)
  
          map_coloring = analyser.allocate_map_coloring(0.05)
  
          # Check number of colors
          assigned_colors = set(map_coloring)
  
          # Check validity of color numbers
          for color_number in range(0, len(assigned_colors), 1):
              if color_number not in assigned_colors:
                  continue
  
          # Check validity of colors
          for index_node in range(len(graph.data)):
              color_neighbors = [
                  map_coloring[index]
                  for index in range(len(graph.data[index_node]))
                  if graph.data[index_node][index] != 0
                  and index_node != index
              ]
              # print(index_node, map_coloring[index_node], color_neighbors, assigned_colors, map_coloring, "\n\n");
              if map_coloring[index_node] in color_neighbors:
                  continue
  
          result_testing = True
  
      assert result_testing
  
file_path: pyclustering/pyclustering/gcolor/tests/ut_sync.py
imports: import unittest
  from pyclustering.nnet import solve_type
  from pyclustering.gcolor.sync import syncgcolor
  from pyclustering.utils.graph import read_graph
  from pyclustering.samples.definitions import GRAPH_SIMPLE_SAMPLES
label_desc: Use image node_id 1 for calling the Test obj's underlying member method code with example usage: obj.templateTestColoringNegativeConnections(filename, solver_type) without return types